The present application relates to asystem for dynamic control of the operation of a heat exchanger, the system comprising a heat exchanger (1), a plurality of injector arrangements (25a, 25b), a local sensor arrangement (29), and a controller (57), whereinthe local sensor arrangement (29) comprises a plurality of local temperature sensors (31a, 31b) being arranged to measure temperature values; and wherein the controller(57)is arranged to determine a difference between the measured temperature values and is further arranged to communicate with the valves(22a, 22b) of the plurality of injector arrangements (25a, 25b) to adjustthelocal amount of first fluid supplied by at least one of the injector arrangements (25a, 25b) in order to even out the determined difference. The application also relates to a method for the dynamic control of the operation of a heat exchanger in such a system.